Hello! I just started attaching a couple of old manual focus Nikon lenses to my GX1. I have to say, I love shooting with adapted lenses! The process really feels a lot more interesting to me. Anyway, I noticed that the Canon FD lenses are quite cheap! I know nothing about them, so I was hopeful that someone who has shot with them could tell me two things: Are these lenses just cheap (bad performance), or are they so plentiful that there is just too much supply to ask for what they are worth? Which are the best Canon FD lenses, and which are the ones to avoid? Thanks!!